MacAddressChanger.py

#!/usr/bin/env python

import subprocess
import argparse
import re


def get_arg():
    parser = argparse.ArgumentParser()
    parser.add_argument("-i", "--interface", dest="interface", help="Interface to change its MAC address")
    parser.add_argument("-m", "--mac", dest="new_mac", help="New MAC address")
    option = parser.parse_args()
    mac_format = re.search(r"\w\w:\w\w:\w\w:\w\w:\w\w:\w\w", str(option.new_mac))
    ifconfig_result = subprocess.check_output(["ifconfig"])
    interfaces = re.findall(r"\w+: ", str(ifconfig_result))
    if not option.interface:
        print("[-]Please specify interface, use --help for more info")
        exit()
    elif not option.new_mac:
        print("[-]Please specify new mac, use --help for more info")
        exit()
    elif not mac_format:
        print("[-]Please use correct mac format, use --help for more info")
        exit()
    elif ((str(option.interface) + ": ") and ("n" + str(option.interface) + ": ")) not in interfaces:
        print("[-]Please use correct interface format, use --help for more info")
        exit()
    return option


def change_mac(interface, new_mac):
    print("[+]Changing Mac address of " + interface + " to " + new_mac)
    subprocess.call(["ifconfig", interface, "down"])
    subprocess.call(["ifconfig", interface, "hw", "ether", new_mac])
    subprocess.call(["ifconfig", interface, "up"])


def get_mac(interface):
    ifconfig_result = subprocess.check_output(["ifconfig", interface])
    mac_search = re.search(r"\w\w:\w\w:\w\w:\w\w:\w\w:\w\w", str(ifconfig_result))
    if mac_search:
        return mac_search.group(0)
    else:
        print("[-]Could not read Mac address")
        exit()


options = get_arg()
current_mac = get_mac(options.interface)
print("Current MAC: " + str(current_mac))
change_mac(options.interface, options.new_mac)
current_mac = get_mac(options.interface)
if current_mac == options.new_mac:
    print("[+]Mac Address changed to: " + current_mac)
else:
    print("[-]Mac address did not changed")